03 18-81 (1995) Ortiz et al.indd

*Department of Biostatistics and Epidemiology, Graduate School of Public Health, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico; †Department of Biology, Faculty of Natural Sciences, University of Puerto Rico, Río Piedras Campus, Puerto Rico; ‡Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, GA, USA; ¶University of Puerto Rico Cancer Control and Population Sciences Program, University of Puerto Rico Comprehensive Cancer Center